Cannot install grub on XFS from chroot

Hi! I am trying to create a live system:
1) Partitioning the disk under GPT. Creating 2 partitions: 4 MB for
grub_core and 32GB for system.
2) I mount the disk, download the rootfs tarball and unpack it.
3) Next I mount /dev, /proc, /sys, copy resolv.conf and chroot into.
4) Now I'm trying to install grub inside a chrooted system:

# grub-install --target=i386-pc /dev/sdc
Installing for i386-pc platform.
grub-install: error: unknown filesystem

This error occurs exactly inside chroot and only when using the xfs file
system. Grub version is 2.06.
Is this a bug or has XFS support been removed from the grub? Or maybe I'm
doing something wrong?

Thank you in advance for your help.